In the era when American cities regularly caught fire, the widespread destruction seeded what looks, in retrospect, like possibility.

Winds in the area were blowing at about 20-30mph (32-48km/h), but could pick up, which would fan the blaze and make it harder for air crews to operate. Climate change has made the grasses and shrubs that are fuelling the Los Angeles fires more vulnerable to burning, scientists have said.

Advisers to California Gov. Gavin Newsom spent the week monitoring new White House advance staffers’ social media accounts, hoping for clues for where President Donald Trump might be headed when he lands in Los Angeles on Friday afternoon to talk about the wildfire damage.